If you use VideoLan’s VLC media player, you should update to the latest version 0.8.6d. Prior versions have a security vulnerability with ActiveX. The latest version can be downloaded from http://www.videolan.org/vlc/
There’s another long Grandpa story to go with this but let’s just leave it that I check all my commonly used programs every 3-4 months for updates if they don’t auto-update and found this one posted.